%0 Journal Article
%T INVESTIGATION ON MARTENSITIC TRANSFORMATION AND FIELD-INDUCED TWO-WAY SHAPE MEMORY EFFECT OF Ni-Mn-Ga ALLOY<br>哈斯勒合金Ni-Mn-Ga的马氏体相变和磁增强双向形状记忆效应
%A LIU ZHU-HONG
%A HU FENG-XIA
%A WANG WEN-HONG
%A CHEN JING-LAN
%A WU GUANG-HENG
%A GAO SHU-XIA
%A AO LING
%A <br>柳祝红
%A 胡凤霞
%A 王文洪
%A 陈京兰
%A 吴光恒
%A 高书侠
%A 敖玲
%J 物理学报
%D 2001
%I 
%X The martensitic phase transformation temperature,Tm and the Curie temperature, TC, of polycrystalline samples Ni2+xMn1-x Ga(x=-0.1,0,0.08,0.13,0.18,0.2) and Ni2-xMn1+x/2Ga1+x/2(x=-0.1,0,0.04,0.06,0.1) have been investigated by measuring the temperature dependence of alternating-current susceptibility. It was found that, with the increase of Ni content,TC decreases and Tm increases for Ni2+xMn1-xGa, and both TC and Tm increase first and decrease afterwards for Ni2-xMn1+x/2Ga1+x/2. Stress-free and two-way thermoelastic shape memory, with 1.2% strain, has been found in single crystal Ni52Mn24Ga24. The deformation can be enhanced more than three times, up to 4.0% shrinkage with a bias field 1.2T applied along the measurement direction. The origin of large recoverable strain should be attributed to the low level of internal stress and the field-induced rearrangement of martensitic variants through twin boundary motion rather than the phase boundary motion.
%K shape memory effect
%K martensitic transformation
%K Ni2MnGa<br>形状记忆效应
%K 马氏体相变
%K Ni2MnGa
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=8ABE8917D8DDE071&yid=14E7EF987E4155E6&vid=771152D1ADC1C0EB&iid=0B39A22176CE99FB&sid=FD7C952458BFB5D8&eid=9CA95D22FC1D537C&journal_id=1000-3290&journal_name=物理学报&referenced_num=17&reference_num=11